◎ 题干
- Have you finished the maths problem?
- Not yet, because I find it difficult ______.
[     ]
A. in working out    
B. working out    
C. to work it out    
D. to work out
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“- Have you finished the maths problem?- Not yet, because I find it difficult ______.[ ]A. in working outB. working outC. to work it out D. to work out…”主要考查了你对  【不定式】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。